.danmu_form{
    position: absolute;
    bottom: 50px;
    left: 5%;
    width: 90%;
    display: flex;
}

.danmu_input{
    width: 20%;
    height: 20px;
    margin-left: 6%;
    font-size: 8px;
     background-color: rgba(84, 82, 82, 0.1); 
     border: none;
     color :#fff;
}

.danmu_form>button{
padding: 1px;
font-size: 5px;
background-color: rgba(198, 193, 193, 0.1);
 border: none;
 color: #ccc;
}